Used on used in pratt and whitney gas turbine engine model ft4a-2 onboard 378 ft whec coast guard vessels. 3a thread class right-hand 0.928" thread length hexagon head style 24 thread quantity per inch cadmium surface treated uns thread series
2a thread class right-hand 0.139" thread length hexagon extended washer head style 18 thread quantity per inch phosphate surface treated unc thread series
3a thread class right-hand 0.625" thread length hexagon head style 2.546" grip length 20 thread quantity per inch passivate surface treated unf thread series
2a thread class right-hand 0.875" thread length hexagon extended washer head style 16 thread quantity per inch finish color black phosphate surface treated unc thread series
3a thread class right-hand 0.374" thread length hexagon head style 0.046" hole diameter 0.359" grip length 32 thread quantity per inch unf thread series